Skip to Main content Skip to Navigation
New interface
Journal articles

12 months is a pivotal age for olfactory perceptual learning and its underlying neuronal plasticity in aging mice

Abstract : Normal brain aging is associated with deficits in cognitive and sensory processes, due to subtle impairment of synaptic contacts and plasticity. Impairment may be discrete in basal conditions but is revealed when cerebral plasticity is involved, such as in learning contexts. We used olfactory perceptual learning, a non-associative form of learning in which discrimination between perceptually similar odorants is improved following exposure to these odorants, to better understand the cellular bases of olfactory aging in mice. We first evaluated learning ability and memory retention in 2-, 6-, 12-, and 18-month-old mice, and identified 12 months as a pivotal age when memory retention subtly declines before learning becomes totally impaired at later ages. We then showed that learning-induced structural plasticity of adult-born granule cells is specific to cells responding to the learned odorants in the olfactory bulb of young adult mice and loses its specificity in 12-month-old mice, in parallel to memory impairment. Taken together, our data refine our understanding of aging-related impairment of plasticity mechanisms in the olfactory bulb and consequent induction of olfactory learning and memory deficits.
Document type :
Journal articles
Complete list of metadata

https://hal-cnrs.archives-ouvertes.fr/hal-03820083
Contributor : Nathalie Mandairon Connect in order to contact the contributor
Submitted on : Tuesday, October 18, 2022 - 5:52:51 PM
Last modification on : Wednesday, October 19, 2022 - 11:59:33 AM

File

FOR HAL Greco-Vuilloud 2022.pd...
Files produced by the author(s)

Identifiers

Citation

Juliette Greco-Vuilloud, Maëllie Midroit, Claire Terrier, Jérémy Forest, Joëlle Sacquet, et al.. 12 months is a pivotal age for olfactory perceptual learning and its underlying neuronal plasticity in aging mice. Neurobiology of Aging, 2022, 114, pp.73-83. ⟨10.1016/j.neurobiolaging.2022.03.003⟩. ⟨hal-03820083⟩

Share

Metrics

Record views

0

Files downloads

0